That’s not the date your application was received, that’s the date they issued the AOR for you and your application was entered in their system. The format of the dates has changed in the new tracker. They used to let people know when they started working on their application in the old tracker. In the new tracker, that date has changed to the AOR date. Since launching the new tracker, they don’t mention the date they received your application in the new tracker. Don’t worry.